Answer:
b. forms the cerebrospinal fluid
Explanation:
Choroid plexuses are part of the central nervous system and are located near the ventricles. They have as their main function the secretion of cerebrospinal fluid, which is the damping fluid for the cerebral cortex and spinal cord. Unfortunately, choroid plexuses are susceptible to the appearance of tumors, but most of these tumors are benign and can be surgically removed.
